fix(graph-proxy): pin CI swagger.json to deployed version of Argo Workflows & fix graph build error

Author: davehadley

.github/workflows/_graph_proxy_code.yaml

@@ -54,7 +54,7 @@ jobs:
   test:
     runs-on: ubuntu-latest
     env:
-      ARGO_SERVER_SCHEMA_URL: https://raw.githubusercontent.com/argoproj/argo-workflows/main/api/jsonschema/schema.json
+      ARGO_SERVER_SCHEMA_URL: https://raw.githubusercontent.com/argoproj/argo-workflows/refs/tags/v4.0.6/api/jsonschema/schema.json
     steps:
       - name: Checkout source
         uses: actions/checkout@v6

backend/graph-proxy/src/graphql/workflow_templates.rs

@@ -293,7 +293,6 @@ impl WorkflowTemplatesMutation {
                 submit_options: Some(
                     argo_workflows_openapi::IoArgoprojWorkflowV1alpha1SubmitOpts {
                         annotations: None,
-                        artifacts: vec![],
                         dry_run: None,
                         entry_point: None,
                         generate_name: None,